vian, like pin&jie said...photography is an art...it's pretty subjective...for some, just the pretty standard pics will do...for others, they would prefer certain kind of styles...the thing is, not every photographer can do the kind of style u want...
so bottomline is, check out various photographers...perhaps an easier way might be, check out the usual range and ur budget...shortlist those photographers and videographers within ur budget...then frm there, check out their works...
of cos some may differ when i use $$ as a value cos like i said earlier, it's an art...so then, u might want to check out some recommended ones to have an overview of wat u really want...
for photographers, u may like to check out these few ones n see - Absolut Resolution, Daylight Pictures, Big Day Studio, 1950 Photography and a few of my personal favourites like ********************** and andy lim...